\" utll 100% 6:55 PM Question . Name the scientists who discovered i) Microscope

Question

" utll 100% 6:55 PM Question . Name the scientists who discovered i) Microscope, ii a Cell, iii) Nucleus, and iv) Chromosomes 2. In 2-3 sentences describe the significance of Mendel's work that laid to the foundation for major areas of biology such as genetics and molecular biology Morgan on flies supported Mendels' work. scientists towards discerning the structure of DNA 3. Describe in 2-3 sentences as to how did the work of Thomas 4 In 2-3 sentences describe the contribution of following Griffith ) Avery, McLeod and McCarty Hershey and Chase )Linus Pauling v) Maurice Wilkins and Rosalind Franklin iMeselson and Stahl s. What is Chargaffs rule? What will be the percentage of Guanine if Adenine is 14% in the total genome of a newly discovered organism? 6 Name the molecules that constitute a nucleotide? 7. What is the difference between a deoxy ribose sugar and a ribose sugar? What is the role of a phosphate molecule in DNA? . What is a phosphodiester bond and in involves which carbon atoms? o Which radioactive atom was used to prove that DNA replicates in semi conservative fashion. 11. Define Major and Minor Grooves. 2 How many number of bases constitute one turn in B, A and Z DNA? 3. What is the distance between two consecutive bases in the DNA?

Explanation / Answer

Question Number 1

1) Microscope: Zacharias Janssen

2) Cell: Robert Hooke

3) Nucleus: Robert Brown

4) Chromosome: Karl Wilhelm von Nägeli

Question Number 2

Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.

Question Number 3

Thomas Hunt Morgan, who studied fruit flies, provided the first strong confirmation of the chromosome theory. Morgan discovered a mutation that affected fly eye color. He observed that the mutation was inherited differently by male and female flies. Based on the inheritance pattern, Morgan concluded that the eye color gene must be located on the X chromosome. Thus he take forward the Mendel work and explain the inheritance pattern of linked genes.

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